Mega Code Archive
Get all prefixes defined, up to the root, for a namespace URI
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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import java.util.List;
import javax.xml.XMLConstants;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
/**
* Few simple utils to read DOM. This is originally from the Jakarta Commons Modeler.
*
* @author Costin Manolache
*/
public class Utils {
private static final String XMLNAMESPACE = "xmlns";
/**
* Get all prefixes defined, up to the root, for a namespace URI.
*
* @param element
* @param namespaceUri
* @param prefixes
*/
public static void getPrefixesRecursive(Element element, String namespaceUri, List<String> prefixes) {
getPrefixes(element, namespaceUri, prefixes);
Node parent = element.getParentNode();
if (parent instanceof Element) {
getPrefixesRecursive((Element)parent, namespaceUri, prefixes);
}
}
/**
* Get all prefixes defined on this element for the specified namespace.
*
* @param element
* @param namespaceUri
* @param prefixes
*/
public static void getPrefixes(Element element, String namespaceUri, List<String> prefixes) {
NamedNodeMap atts = element.getAttributes();
for (int i = 0; i < atts.getLength(); i++) {
Node node = atts.item(i);
String name = node.getNodeName();
if (namespaceUri.equals(node.getNodeValue())
&& (name != null && (XMLNAMESPACE.equals(name) || name.startsWith(XMLNAMESPACE + ":")))) {
prefixes.add(node.getPrefix());
}
}
}
}
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